Portable drill tree tapping machine



Jan. 6, 1948. H. E. ALLEN PORTABLE DRILL TREE TAPPING MACHINE Filed July 14, 1944 2 Sheets-Sheet l I npentor 15225527 E 1941.5,

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Jan. 6, 1948.

H. E. ALLEN PORTABLE DRILL TREE TAPPING MACHINE Filed July 14, 1944 2 Shee ts-Sheet 2 Inventor fi'fsveazer E. due/v,

Patented Jan. 6 1948 UNITED STATES PATENT OFFICE 2,434,089 PORTABLE DR ILL TREE TAPPIN G MACHINE 7 'Herbert E. Allen, Canton, N. Y. j Application J uly'14, 1944, Serial No. 544,951

2 Claims. (01. 224-) This invention relatestoportable drills and more particularly to a drill especially suited for tapping trees, such, for example, as maple trees.

A primary object of this invention is the provision of a completely self-contained portable drill requiring no external source of power, which may be easily carried by one man.

An additional object is the provision of such a drill particularly adapted for tapping trees, as for example, maple trees, in a rapid and efiicien manner. 7

A more specific object is the provision of such a drill driven by a motor, the motor being so mounted as to reduce vibration and corresponding discomfort to the user, to a minimum.

A still further object is the provision of a portable drill which is sturdy and durable in construction, reliable in operation, and relatively light and easy to carry.

A further specific object is the provision of an improved cover for the bit of the drill when the same is not in use, both to protect the bit from injury, and the person of the user.

Other objects reside in the combinations of elements, features of construction, and arrangement of parts, all as will be more fully pointed out hereinafter and shown in the accompanying drawings, wherein there is shown one preferred form of this inventive concept.

In the drawings:

Figure 1 is a side elevationalview of one form of this invention, certain parts thereof being shown in section and certain other parts being broken away. i

Figure 2 is an enlarged detail View of a drive shaft for the bit comprising a part of this invention.

FigureS is a side elevational view of the drill head and bit. l

Figure 4 is a front elevational view of the carrying device for the motor comprising an element of this invention, and

Figure 5 is an enlarged sectional view of the protective cover member for the bit.

Like reference numerals refer to like parts throughout the several views of the drawings.

Having particular reference now to Figure 1 there is generally indicated at ID a carrying or supporting member, adapted to support a gasoline motor ll of any desired type. Support l0 also carries a fuel tank l2, from which a feed line [3 leads to motor ll. Having particular reference now to the supporting member In it the same is comprised of a plate [5, adapted to abut Washers 20.

rest adjacent the back of the user, when in operative position, and a second supporting plate l6 secured to plate 15 and extending at substantially right angles thereto adapted to carry motor II and gas tank l2. As shown, the motor is adjacent to but slightly spaced from the back plate and thus there is provided a space functioning as a dead air or heating insulating space, protecting the back of the person to some extent from the heat of the motor. Plate [6 has its side edges turned downwardly to provide flanges ll for strengthening and reinforcing the plate. A plurality, preferably four, bolts l8 are passed through suitably spaced apertures in plate l6 and have positioned thereabout coil springs l9 adapted to As best shown in Figure 1, when motor [I is mounted on plate It bolts l8 extend upwardly through suitable apertures in a flange 21 comprising the base of motor II and have nuts 22 threaded to the upper extremities thereof to hold the motor in related assembly with respect to carrier member Iii. Thus it will beseen that the motor is cushioned on springs l9, and fioatingly supported thereby, so that the vibration incident to the operation of the motor is largely absorbed by springs I9 and not transmitted to carrier plate I6 and thence to the person of the user. Reinforcing straps 25 (see Figure 1) extend from the upper portion of plate E5 to a midpoint of plate l6, beingsecured to these plates in any desired manner and provide additional support for the weight of motor II and to some extent constitutes a guard or shield therefor. Suitable carrying straps 26 are secured to plate l5 whereby the same may be supported on the back of the user in a manner similar to that of the conventional packs or knap-sack. The lower ends of straps 26 may be detachably secured to the base of plate l5, as, for example, by means of snap-hooks 21 engaging suitable extending rings 28 secured to plate I5.

Motor ll drives through a conventional flexible drive shaft 30, a. drill shaft 3! adapted to fit within the casing of a drill 32 provided with a clamping head 33, adapted to hold a bit 34. Positioned about drive shaft 3| is a pair of roller bearing members 35 spacing the shaft from the inner walls of casing 32. Roller bearings are used in preference to ball or similar type bearings, for the reason that the thrust force exerted when utilizing the device to drill a hole tends to shift the position of ball-bearings occasioning scouring of the drive shaft. The use of roller bearings obviates this difliculty. Casing 32 is provided 35 to engage channel 43, to prevent the guard-- from being accidentally displaced, or-slipping out of position.

From the foregoing the mode of operationofl the device should now be readily, understood.-

The user merely places frame lllon 'his back se-" curing the same in carrying positions by;rne'ans:

of straps 36, and starts the motor H. Guard 49 :is. retained in position over bit; 3 1 untilthe first tree to betapped isreachedwhen'it isremoved, and asuitab-lehole-drilled into the tree. The operation is then successively repeated until all the trees ofy a particular tract have been tapped. The motoris then shut off, guard me i-- ber Ml'replaced andthe apparatus removed from the-users back.

While'the invention has been described particularly in conjunction with the tapping of trees,

such as maple trees, it will be understood that it maybe utilize-d with eq-ual advantage. for other purposesas for example, the tapping of rubber trees or the tapping of citrus-fruit trees for graftmg. 7 s

It will alsobe understood that while the device has been hereindescribed as-an implement for tapping trees it may be advantageously utilized in any situation where the usezof a portable drill is required or desirable;

It will also be understoodthat while the apparatus has been described in conjunction with a gasoline engine, any suitablesourceof power, provided the same is-wholly; self-contained and portablemay be utilized.

From the foreging it will now beseen that there.

is herein providedanapparatus achievingall the objects of this invention and others includingmany advantagesof great=practical utility andcommercial importance. c

As many modifications maybe made in the ap paratus hereinb'efore-shown andv described andv as many. modificationsmaybe made inethis .embodiment, -.,it is, tobe understood that all matter illustrative and not in a limiting sense;

Having-describedthe invention, what is claimed as new is:

1, A portable power plant includinga base- CasingSZis, asbest shownin Figure 3',

4 plate, a back plate rigidly secured perpendicularly to said base plate upon a back edge thereof, a supporting harness secured to said back plate for carrying and suspending said power plant upon the back of a user, a pair of reinforcing and shielding bars attached at one end to the upper portion of said back plate and at their other end to the sides of said base plate intermediate thereof, an internal combustion engine amounted solely upon said base plate, resilient support means interposed between said engine and said base plate,

'apower take-01f from said engine and a fuel tank connected with said engine and mounted upon said base plate, said engine being mounted upon the back-portion of said base plate and adjacent said back-plate but slightly spaced from said back plate to provide a dead air heat insulating space therebetween and between said reinforcing bars.

= upon the back of a-user; apair of. reinforcing and.

2. A portable power plant including a base plate, a .ib'ack-i plate" rigidly secured: perpendicularly to'said base vplate'upon a back .edgethereof, asupporting harness' secured to said back plate for carrying and: suspending said power plant shielding bars attached at-one' end to the upper portion of said back plate 'andat their: other end to the sides of said base plate intermediatethereof, an internal combustion engine mounted solely upon said-base plate, resilient support means interposed between said engine and said baseplate, apower take-off" from said engine and a fuel tank connected with said engine and-"mounted upon said base plate, said engine beingrnou'n'ted' upon theback portion of sai'dbase plate and adjacent said backplate but slightly spacedfrom said back plate to provide a dead air heat'insulatingspace therebetween and between saidreinforcing bars,

I and said fuel tank being m'ounted'on the outward portion of said base plateandoutwardly from said engine. 7

- HERBERT'EQ ALLEN.

nEFERENoEsorrED The following references are of record in th'e file .of this patent:

UNITED STATES 'PA-TENTS' Number Name Date 1,370,768 Sperling Mar. 8, 1921 1,723,430 Lee -Aug. 6, 1929 1,799,650 Schoenburg-,- 1 Apr, '7, 1931 1,981,076 Sells NOV; 20, 1934 2,119,962 Raleigh r June 7, 1938 FOREIGN" PATENTS Number Country Date 138,928 Austria Oct, 10, 1934'- 833,853- France July 25, 1938 

